range_display.cpp

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/*
 * Copyright (c) 2012, Willow Garage, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Willow Garage, Inc. nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
 
#include <OgreSceneNode.h>
#include <OgreSceneManager.h>
 
#include <rviz/display_context.h>
#include <rviz/frame_manager.h>
#include <rviz/ogre_helpers/shape.h>
#include <rviz/properties/color_property.h>
#include <rviz/properties/float_property.h>
#include <rviz/properties/int_property.h>
#include <rviz/properties/parse_color.h>
 
#include "range_display.h"
#include <limits>
 
namespace rviz
{
RangeDisplay::RangeDisplay()
{
  color_property_ = new ColorProperty("Color", Qt::white, "Color to draw the range.", this,
                                      &RangeDisplay::updateColorAndAlpha);
 
  alpha_property_ = new FloatProperty("Alpha", 0.5, "Amount of transparency to apply to the range.",
                                      this, &RangeDisplay::updateColorAndAlpha);
 
  buffer_length_property_ =
      new IntProperty("Buffer Length", 1, "Number of prior measurements to display.", this,
                      &RangeDisplay::updateBufferLength);
  buffer_length_property_->setMin(1);
}
 
void RangeDisplay::onInitialize()
{
  MFDClass::onInitialize();
  updateBufferLength();
  updateColorAndAlpha();
}
 
RangeDisplay::~RangeDisplay()
{
  for (size_t i = 0; i < cones_.size(); i++)
  {
    delete cones_[i];
  }
}
 
void RangeDisplay::reset()
{
  MFDClass::reset();
  updateBufferLength();
}
 
void RangeDisplay::updateColorAndAlpha()
{
  Ogre::ColourValue oc = color_property_->getOgreColor();
  float alpha = alpha_property_->getFloat();
  for (size_t i = 0; i < cones_.size(); i++)
  {
    cones_[i]->setColor(oc.r, oc.g, oc.b, alpha);
  }
  context_->queueRender();
}
 
void RangeDisplay::updateBufferLength()
{
  int buffer_length = buffer_length_property_->getInt();
  QColor color = color_property_->getColor();
 
  for (size_t i = 0; i < cones_.size(); i++)
  {
    delete cones_[i];
  }
  cones_.resize(buffer_length);
  for (size_t i = 0; i < cones_.size(); i++)
  {
    Shape* cone = new Shape(Shape::Cone, context_->getSceneManager(), scene_node_);
    cones_[i] = cone;
 
    Ogre::Vector3 position;
    Ogre::Quaternion orientation;
    geometry_msgs::Pose pose;
    pose.orientation.w = 1;
    Ogre::Vector3 scale(0, 0, 0);
    cone->setScale(scale);
    cone->setColor(color.redF(), color.greenF(), color.blueF(), 0);
  }
}
 
void RangeDisplay::processMessage(const sensor_msgs::Range::ConstPtr& msg)
{
  Shape* cone = cones_[messages_received_ % buffer_length_property_->getInt()];
 
  Ogre::Vector3 position;
  Ogre::Quaternion orientation;
  geometry_msgs::Pose pose;
  float displayed_range = 0.0;
  if (msg->min_range <= msg->range && msg->range <= msg->max_range)
  {
    displayed_range = msg->range;
  }
  else if (msg->min_range == msg->max_range)
  { // Fixed distance ranger
    if (msg->range < 0 && !std::isfinite(msg->range))
    { // NaNs and +Inf return false here: both of those should have 0.0 as the range
      displayed_range = msg->min_range; // -Inf, display the detectable range
    }
  }
 
  pose.position.x =
      displayed_range / 2 -
      .008824 * displayed_range; // .008824 fudge factor measured, must be inaccuracy of cone model.
  pose.orientation.z = 0.707;
  pose.orientation.w = 0.707;
  if (!context_->getFrameManager()->transform(msg->header.frame_id, msg->header.stamp, pose, position,
                                              orientation))
  {
    ROS_DEBUG("Error transforming from frame '%s' to frame '%s'", msg->header.frame_id.c_str(),
              qPrintable(fixed_frame_));
  }
 
  cone->setPosition(position);
  cone->setOrientation(orientation);
 
  double cone_width = 2.0 * displayed_range * tan(msg->field_of_view / 2.0);
  Ogre::Vector3 scale(cone_width, displayed_range, cone_width);
  cone->setScale(scale);
 
  QColor color = color_property_->getColor();
  cone->setColor(color.redF(), color.greenF(), color.blueF(), alpha_property_->getFloat());
}
 
} // namespace rviz
 
#include <pluginlib/class_list_macros.hpp>
PLUGINLIB_EXPORT_CLASS(rviz::RangeDisplay, rviz::Display)